Theorem 3impdi

Description: Importation inference (undistribute conjunction). (Contributed by NM, 14-Aug-1995)

	Ref	Expression
Hypothesis	3impdi.1	|- ( ( ( ph /\ ps ) /\ ( ph /\ ch ) ) -> th )
Assertion	3impdi	|- ( ( ph /\ ps /\ ch ) -> th )

Proof

Step	Hyp	Ref	Expression
1		3impdi.1	|- ( ( ( ph /\ ps ) /\ ( ph /\ ch ) ) -> th )
2	1	anandis	|- ( ( ph /\ ( ps /\ ch ) ) -> th )
3	2	3impb	|- ( ( ph /\ ps /\ ch ) -> th )